Organ stop-knob



(NoM oooo l.)

R. ALDEN.

ORGAN STOP KNOB.

No. 369,310. Patented Sept. 6, 1887.

UNITED STATES PATENT OFFICE.

RINALDO ALDEN, OF CHICAGO, ILLINOIS.

ORGAN STQP-KNQB.

SPECIFICATION forming part of Letters Patent No. 369,310, dated September 6, 1887.

Application filed April 23, 1886. Serial No. 199,978. (No model.)

To all whom it may concern.-

Be it known that I. RINALDO ALDEN, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented a new and useful Improvement in Organ Stop-Knobs, of which the following is a full description, reference being had to the accompanying drawings, in which similar letters of reference indicate like parts in all the figures.

My invention consists of an improved stopknob for organs constructed of one piece, into which the name-plate is sprung by pressure and held in position by its own elasticity, without the use of glue or other fastening.

In the drawings, Figure l is a section ofmy improved knob; Fig. 2, a section of the same, showing the support-pin and block by means of which the name-plate is forced into position. Fig. 3 is a section of my improved knob, showing a convex face.

A is the knob, of the form shown, provided with the bezel a, underneath which is the groove b, for the reception of the plate 0. The plate 0 is of diameter of the groove 1), and is made of an elastic substance, preferably celluloid, upon which is placed the name of the stop.

B is a block, having fastened to its center the support-pin M, as shown in Fig. 3.

To fasten the plate 0 to the knob, the knob is passed over the pin M until it rests on the block 13. The pin M is high enough to allow its upper end to touch the under surface ofthe name-plate 0 when the same is placed on the u bezel a of the knob. The plate 0 being so placed, a downward pressure is applied to the circumference of the name-plate O by the use of a plunger provided with a concave end, ring, or other convenient shape, and operated by any well-known mechanical method. As the center of the plate is supported by the pin M, the circumference of the plate may be depressed until the edge passes the bezel a, after which the pressure is removed and the plate springs into the groove 1), where it remains firmly in position by its own elasticity.

I am aware that organ stop-kn obs have heretofore been made in which the plate is depressed into a concavity in the knob and then allowed to spring into position, where it is retained by the use of a block fastened to the knob and the under side of the plate with glue or other fastening; hence I do not claim this form of knob.

That I do claim, and desire to secure by Letters Patent, is

An organ stop-knob made of a single piece, having a convex face with the name-plate hold in position by its own elasticity, substantially as described.

BIN ALDO ALDEN.

Witnesses:

THEODORE Wononsrnn, P. J. MAGINNIs. 

